AlmaLinux 9.6 [TuxCare] Security Update: tomcat / tomcat-admin-webapps / tomcat-docs-webapp / etc (ALMALINUX9.6:CLSA-2026:1788514837)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(351781);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/30");

  script_cve_id("CVE-2026-73180");
  script_xref(name:"CLSA", value:"2026:1788514837");

  script_name(english:"AlmaLinux 9.6 [TuxCare] Security Update: tomcat / tomcat-admin-webapps / tomcat-docs-webapp / etc (ALMALINUX9.6:CLSA-2026:1788514837)");

  script_set_attribute(attribute:"synopsis", value:
"The AlmaLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare
ALMALINUX9.6:CLSA-2026:1788514837 advisory.

  - Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an
    authenticated HTTP session was changed after a WebSocket connection had been established under that
    authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket
    specification when the HTTP session ended. This issue affects Apache Tomcat: from 11.0.0-M1 through
    11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at
    the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through
    7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version
    11.0.25, 10.1.58 or 9.0.121, which fix the issue. (CVE-2026-73180)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://security.tuxcare.com/csaf/v2/els_os/tuxcare9.6esu/advisories/2026/clsa-2026_1788514837.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?601b84cf");
  script_set_attribute(attribute:"see_also", value:"https://cve.tuxcare.com/els/releases/CLSA-2026:1788514837");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages based on the guidance in TuxCare advisory ALMALINUX9.6:CLSA-2026:1788514837.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-73180");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/08/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/30");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Alma Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/OS/extended-third-party", "Host/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");

  exit(0);
}
include('rpm2.inc');

var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (empty_or_null(third_party_support) || third_party_support != 'TuxCare') exit(0, 'TuxCare support not enabled.');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'AlmaLinux' >!< os_product) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
if (! preg(pattern:"^9.6([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'AlmaLinux 9.6', 'AlmaLinux ' + os_version);

if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);


var constraints = [
  {
    'release': '9',
    'sp': '6',
    'pkgs': [
      {'reference':'tomcat-9.0.87-3.el9_6.3.tuxcare.els17', 'sp':'6', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat-admin-webapps-9.0.87-3.el9_6.3.tuxcare.els17', 'sp':'6', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat-docs-webapp-9.0.87-3.el9_6.3.tuxcare.els17', 'sp':'6', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat-el-3.0-api-9.0.87-3.el9_6.3.tuxcare.els17', 'sp':'6', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat-jsp-2.3-api-9.0.87-3.el9_6.3.tuxcare.els17', 'sp':'6', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat-lib-9.0.87-3.el9_6.3.tuxcare.els17', 'sp':'6', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat-servlet-4.0-api-9.0.87-3.el9_6.3.tuxcare.els17', 'sp':'6', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'tomcat-webapps-9.0.87-3.el9_6.3.tuxcare.els17', 'sp':'6', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}


if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'tomcat / tomcat-admin-webapps / tomcat-docs-webapp / etc');
}